{
  "manageEntity": {
    "action": "Update",
    "entityId": "408163590",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8d7d4cb476785bed45efa74d1a2721d8532dc9b2209e943611f100520fa4cad5",
    "signature": "0x9adb9e54a1598169df9dd922394b4c9264a80d34505f13a9fe35500170eca26f4e42246f2dcd355bc7e1def1cc6f586748e6897dbd43b2fccaa2ecf00df3bf351b",
    "signer": "0xF140e464284e38a817eb2D1Cc258c9bf93068853",
    "userId": "408163590"
  }
}